Evaporating apparatus



(No Model.) v

T. G'AUNT. EVAPORATING APPARATUS.

No. 416,455. Patented Dec. 3, 1889.

. |T]\/EI"IIDY2 2700M @M wr W Witnesses:

N PETERS, Fhnin'lilhngriphar, Washingion. D. C.

UNITED STATES PATE T OFFICE.

THOMAS GAUNT, OF BROOKLYN, NE\V YORK.

EVAPORATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 416,455, dated December 3, 1889.

Application filed September '7, 1888. Serial No. 284,804. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS GAUNT, of Brooklyn, county of Kings, State of New York, have invented an Improvement in Evaporating Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts;

This invention relates to evaporating apparatus, and has for its object to provide an auxiliary apparatus, or, as it may be termed,

' a separator, by which the solid or heavier matter or particles held in suspension by the vapors resulting from the process of evaporation may be eifectually separated therefrom.

The auxiliary apparatus or separator is esrating apparatus such as shown and described in another application, Serial No. 258,655,

filed by me December 22, 1887.

lVith the apparatus shown in the application referred to the solution is flowed over a heated evaporating-surface and the vapors arising therefrom may be employed as the heating agent of another apparatus, or they may be conveyed to a suitable condenser. hen the vapors from one apparatus are employed as the heating agent of another evaporating apparatus, the heating effect of the said vapors upon the evaporating-surface is largely impaired by the moisture and solid matter orimpurities carried over thereby, which form upon the evaporating-surface a coating or incrustation.

My invention has for its object to provide an apparatus or separator through which the vapor from the evaporating apparatus is caused to pass and the moisture and solid matter orimpurities separated from the steam, so that the steam entering the second appar'atus is free from moisture and impurities and more effective as a heating agent, thereby producing an increased evaporation in the second apparatus.

The particular features in which my inven: tion consists will be pointed out in the claims at the end of this specification.

Figure 1, in section and elevation, shows a sufficient portion of an evaporating apparatus provided with the auxiliary apparatus or separator to enable my invention to be understood, one side of the inclosing-shell of the evaporating apparatus being removed. Fig. 2 is a top or plan view of the auxiliary apparatus or separator.

The shell to, containing a number of evapcrating-surfaces a over which the liquid to be 1 evaporated is flowed, the said liquid being s upplied from a tank or reservoir a by a pipe a, having branch pipes a may be substantially such as shown and described in the application referred to. The, vapors given off from the evaporating-surfaces are conducted from the shell to by the pipe 1) into the auxiliary apparatus or separator, consisting, essentially, of a shell or case 1), preferably enlarged at one end, as at b the said case containing a pipe or tube 12 herein shown as extended therein for about half the length of the said. case, the pipe or tube having one or more helices or spiral vanes or wings I), surrounding the said pipe, to thus form a spiral passage or channel encircling or winding about said pipe or tube a plurality of times. The vane or wing herein shown encircles the tube b several times, thus insuring rotation of the vapor. The pipe or tube 12 in practice may be connected at its upper end by a pipe I) to the evaporatingsurface of a second apparatus, (not shown,) or it may be to a condenser. The vapor entering the spiral passage referred to travels about the tube or pipe a plurality of times and has imparted to it a rotary motion, and the liquid and solid matter is by centrifugal action most effectively separated from the steam, the liquid and solid matter falling to the bottom of the chamber'within the enlarged portion 1) of the shell or case, the steam freed from moisture, liquid particles, and solid matter passing upward out of the shell or case through the pipe or tube 5 The liquid and solid matter may be drawn ofi from the chamber by a pipe I), which leads it away to a suitable tank, or the said pipe may be connected to the supply-pipe.

The steam which passes off by the pipe b and which constitutes the heating agent of the second evaporating apparatus, (not shown,) is free from moisture and substantially dry, whereby its heating effect is largely increased, and consequently the evaporation of the second apparatus largely augmented,

the water formed by the condensation of the said steam being colorless.

I have herein shown the separator as vertically arranged; but it is evident that the same may be placed in any other desired position. The pipe I) is preferably so connected to the ease Z) as to permit the vapor to enter the case tangentially, as shown by Fig. 2, as thereby the vapor is better enabled to maintain its initial speed than were the vapor entered immediately opposite the center of the pipe b By compelling the steam, gases, or vapors freed from watery particles to pass toward the center of the chamber 11 and to leave the said chamber in the same direction that they entered it and through a pipe about which the said steam, gases, or vapors in heated condition pass when coming into the chambers L enables me to absolutely dry the said steam, gas, or vapor, thus depriving it of any watery portion containing coloring-matter or impurities.

The auxiliary apparatus or separator is especially advantageous when the vapors arising from the evaporating apparatus are carried directly to the condenser or are discharged into the atmosphere, for the material or solution carried off by the vapors is caught or retained in the separator, and only the steam passes to the condenser or atmosphere, thereby effecting a very considerable saving of the material.

I elain1 1. The herein-described separator, consisting of a shell or case provided with a tangential inlet, a tube or pipe extend'ed but partially into the said shell or case and forming the steam-outlet for the said shell or case, and a helix surrounding said pipe to form a spiral channel or passage having a plurality of turns about said pipe, the uppermost turn of the said spiral passage communicating directly with the tangential inlet to form a continuation thereoflwhereb y the steam admitted tangentially into the case is maintained at substantially its initial velocity in its passage through the spiral channel, substantially as and for the purpose specified.

2. The combination, with the steam or vapor outlet pipe of an evaporating apparatus, of a separator consisting of a shell or case provided with a tangential inlet to which the said outlet-pipe is connected, a tube or pipe extended but partially into the said shell or case and forming the steam-outlet for the said shell or case, and a helix surrounding said pipe to form a spiral channel or passage having a plurality of turns about said pipe, the uppermost turn of the said spiral passage communicating directly with the tangential inlet to form a continuation thereof, whereby the steam admitted tangentially into the case is maintained at substantially its initial veloeity in its passage through the spiral channel, substantially as and forthe purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS GAUN'I.

Witnesses:

G. W. GREGORY, B. DEVVAR. 

